on-restart-benchmarks/contribs/qecode/examples/network-pricing2.cpp

/****   , [ optim2.cc ],
Copyright (c) 2008 Universite d'Orleans - Jeremie Vautard

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of this software and associated documentation files (the "Software"), to deal
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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The above copyright notice and this permission notice shall be included in
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 *************************************************************************/

#include <gecode/minimodel.hh>
#include <gecode/search.hh>
#include "QCOPPlus.hh"
#include "qsolver_qcop.hh"
#include <iostream>
#include <vector>

using namespace std;
using namespace Gecode;
using namespace Gecode::Int;

void printStr(Strategy s,int depth) {
    StrategyNode plop = s.getTag();
    for (int glou=0;glou<depth;glou++) cout<<" ";
    if (s.isTrue()) cout<<"TRUE"<<endl;
    else if (s.isFalse()) cout<<"FALSE"<<endl;
    else cout<<"type "<<plop.type<<" qt "<<plop.quantifier<<" vmin "<<plop.Vmin<<" vmax "<<plop.Vmax<<" scope "<<plop.scope<<" - ";
    for (int i=0;i<s.getTag().valeurs.size();i++) cout<<s.getTag().valeurs[i]<<" ";
    cout<<endl;
    for (int glou=0;glou<depth;glou++) cout<<" ";
    cout<<s.degree()<<" child(ren)"<<endl;
    for (int i=0;i<s.degree();i++) {
        for (int glou=0;glou<depth;glou++) cout<<" ";
        cout<<"Child "<<i<<" : "<<endl;
        printStr(s.getChild(i),depth+1);
    }
}

vector<int> assignment;
void listAssignments(Strategy s) {
  StrategyNode tag = s.getTag();
  if (s.isTrue()) {
    // We are at the end of a branch : we print the assignment)
    for (int i=0;i<assignment.size();++i) cout<<assignment[i]<<" ";
    cout<<endl;
    return;
  }
  if (assignment.size()<= tag.Vmax) assignment.resize(tag.Vmax + 1);
  for (int i=tag.Vmin;i<=tag.Vmax;++i) {
    assignment[i] = tag.valeurs[i-(tag.Vmin)];
  }
  // recursively extracting each child
  for (int i=0;i<s.degree();++i) {
    listAssignments(s.getChild(i));
  }
}

int main() {
    int NCustomer = 2;
    int NArc = 3;
    int* c = new int[NCustomer*NArc]; // c[NArc*i + j] cost for ci to reach Aj
    int* d = new int[NCustomer]; // demand for customer i
    int* u = new int[NCustomer]; // max price for customer i
    int max;

    c[0*NArc+0] = 5;  c[1*NArc+0] = 3;
    c[0*NArc+1] = 4;  c[1*NArc+1] = 6;
    c[0*NArc+2] = 2;  c[1*NArc+2] = 5;

    d[0] = 10;  d[1] = 7;
    u[0] = 70;  u[1] = 90;

    max = 100;


    IntArgs carg(NCustomer*NArc,c);
    IntArgs darg(NCustomer,d);
    IntArgs uarg(NCustomer,u);


    bool q[] = {false,true,false};
    int* nv = new int[3];
    nv[0] = NArc;
    nv[1] = 1;
    nv[2] = 9;

    Qcop problem(3,q,nv);
    for (int i=0;i<NArc;i++)
        problem.QIntVar(i,0,10); // t[i]
    IntVarArgs branch1(NArc);
    for (int i=0;i<NArc;i++)
        branch1[i] = problem.var(i);
    branch(*(problem.space()),branch1,INT_VAR_SIZE_MIN(),INT_VAL_MIN());
    problem.nextScope();

    problem.QIntVar(NArc,0,NCustomer-1); // k
    IntVarArgs branch2(NArc+1);
    for (int i=0;i<NArc+1;i++)
        branch2[i] = problem.var(i);
    branch(*(problem.space()),branch2,INT_VAR_SIZE_MIN(),INT_VAL_MIN());
    problem.nextScope();

    problem.QIntVar(NArc+1,0,NArc-1); // a
    problem.QIntVar(NArc+2,0,max); // cost
    problem.QIntVar(NArc+3,0,max); // Income
    IntVar a(problem.var(NArc+1));
    IntVar cost(problem.var(NArc+2));
    IntVar income(problem.var(NArc+3));
    problem.QIntVar(NArc+4,0,max);
    problem.QIntVar(NArc+5,0,max);
    problem.QIntVar(NArc+6,0,max);
    problem.QIntVar(NArc+7,0,max);
    problem.QIntVar(NArc+8,0,max);
    problem.QIntVar(NArc+9,0,max);
    IntVar aux1(problem.var(NArc+4)); // k* NArc + a
    IntVar aux2(problem.var(NArc+5)); // c[k*Narc+a]
    IntVar aux3(problem.var(NArc+6)); // t[a]
    IntVar aux4(problem.var(NArc+7)); // d[k]
    IntVar aux5(problem.var(NArc+8)); // c[]+t[]
    IntVar aux6(problem.var(NArc+9)); // u[k]
    IntVar k(problem.var(NArc));
    rel(*(problem.space()), aux1 == ( NArc * k + a) );
    element(*(problem.space()),carg,aux1,aux2);
    IntVarArgs t(NArc);
    for (int i=0;i<NArc;i++) t[i]=problem.var(i);
    element(*(problem.space()),t,a,aux3);
    element(*(problem.space()),darg,k,aux4);
    rel(*(problem.space()), aux5 == aux2 + aux3);
    mult(*(problem.space()),aux5,aux4,cost); // cost = aux5 * aux4
    mult(*(problem.space()),aux3,aux4,income);
    element(*(problem.space()),uarg,k,aux6);
    rel(*(problem.space()),cost <= aux6);

    IntVarArgs branch3(NArc+10);
    for (int i=0;i<NArc+10;i++)
        branch3[i] = problem.var(i);
    branch(*(problem.space()),branch3,INT_VAR_SIZE_MIN(),INT_VAL_MIN());

    OptVar* costopt = problem.getExistential(NArc+2);
    OptVar* incomeopt = problem.getExistential(NArc+3);
    problem.optimize(2,1,costopt); // at scope 2, we minimize (1) the variable cost
    AggregatorSum somme;
    OptVar* sumvar = problem.getAggregate(1,incomeopt,&somme);
    problem.optimize(0,2,sumvar);


    QCOP_solver sol(&problem);
    unsigned long int nodes=0;

    Strategy outcome = sol.solve(nodes);

    cout<<"STRATEGY DESCRIPTION : "<<endl;
    printStr(outcome,0);
    cout<<endl<<"____________________"<<endl;
    listAssignments(outcome);
    return 0;
}